Kent · England
Window & door mastic in Forstal, Kent
Window and door frames in Forstal need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Mastic that’s falling out in pieces
- Untidy mastic left by window fitters
- Leaking joints at the ends of sills
About our window mastic in Forstal
Most frames have an outside joint and an inside one. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. If you’re dealing with rushed sealant from a window installation and cracked sealant at the sill ends, we can help.
Mastic can only go onto a dry, clean joint, so window work in Forstal is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Your job is guaranteed for a year, as with all our work.
- Where
- Forstal (ME20)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes most of a day for a typical house, less for a few frames. For a village or hamlet like Forstal, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
For window mastic in Forstal, call 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Damp coming through the wall itself rather than the frame joint
- A frame that has rotted at the joint
- Condensation trapped between the panes
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Timber windows & doors
- Composite doors
- Patio & French doors
- uPVC windows
- Aluminium frames
- Window sills
Why it’s worth doing now in Forstal
Not every sealant suits a window. Interior caulk and bathroom silicone aren’t made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. Older cottages and farmhouses around Forstal can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
Why us?
- Domestic, commercial and hotel work
- We never seal over old sealant
- Rated 4.9 stars on Google
- Anti-fungal sanitary silicone in wet areas
Take a look at what affects the cost and what customers say.
Landlord and commercial work in Forstal
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
FAQs for Forstal
Is Forstal in your area for window mastic?
Yes, Forstal is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Will you come out to Forstal?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for letting agents?
Yes, regularly. Several properties can be quoted together, and between tenancies is a good time for the work.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do you have insurance?
Yes, we are fully insured for every job we do.
Can you get sealant to suit coloured frames?
Yes. We can use white, brown, anthracite grey, black or clear, so the joint suits the frame.
Can new window sealant be painted?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Tell us if you’re decorating and we’ll choose accordingly.
What affects the quote in Forstal
You will get a clear quote before any work starts. It takes into account:
- Whether there’s mould to deal with
- The size of the job
- The old material and how stubborn it is
- How many rooms, windows or areas are involved
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or send us an email and we’ll talk you through it.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- The address or postcode of the job
- Roughly how big the job is
- What’s wrong with the joints now
- Whether it has been sealed before
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Other services in Forstal
Window mastic in Forstal: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Starkey Castle (about 4.4 miles north) are a reminder that the area around Forstal has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you look after a building such as St Peter's Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Aylesford station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Forstal is about 3 miles north-west of Maidstone, in Kent. Homes, rented property, offices and hotels in Forstal can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Forstal is one of 922 places in Kent where we work. London is on our list too, around 29 miles away.
Here we cover the ME20 postcode area for window mastic. If you need window mastic at a property on Beddow Way and Forstal Road or a nearby road, our applicators can take on the job. Close by, we work in Pratling Street (1 mile north-east), Eccles (1 mile north-west), New Hythe (2 miles west), Burham (2 miles north) and Larkfield (2 miles west). We also work in nearby towns such as Maidstone (3 miles south-east), Sittingbourne (11 miles east), Dartford (15 miles north-west), Sevenoaks (13 miles west), Royal Tunbridge Wells (15 miles south-west) and Gravesend (10 miles north-west).
Landmarks near Forstal
Typical jobs here are in homes near Aylesford School, The Bush pub and Tyland Barn and the streets around them. For rail, the closest station is Aylesford station, about 1.2 miles west. A little further out are Medway megaliths (1 mile north) and Maidstone Hospital (2 miles south). For a walk, there’s Boxley Hills and Burham Down.
Do you need window mastic in Forstal?
Sills take more water than any other part of a window, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
The problems people normally mention when they call include:
- Gaps between the frame and the inside reveal
- Draughts coming in around windows and doors
- Gaps where the sill meets the wall
- Water coming in at the bottom corners of a door
In the older streets around Methodist Church Including Sunday School, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- Are they insured?
- What happens if they find a problem under the old sealant
What the job involves on each surface
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We’ll tell you which suits your home.
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. We match the colour to the frame.